Stain-indicator.



E. EGKART.

STAIN INDICATOR.

APPLICATION FILED JUNE 8, 1909.

935,474.. Patented Sept. 28, 1909.

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UNITED STATES PATENT ()FFIQE.

EDMUND EGKART, OF NEW ROCHELLE, NEW YORK, ASSIGNOR '10 GERSTENDORFERBROS., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

STAIN-INDICATOR.

To all whom it may concern.

Be it known that I, EDMUND ECKART, a citizen of the United States, and aresident of New Rochelle, county of IVestchester, and State of New York,have invented certain new and useful Improvements in Stain-Indicators,of which the following is a specifir cation.

My invention relates to an indicator for showing absolutely orcomparatively the effect of one or more coats of any one of a number ofdifferent colored stains as applied to any one of a number of differentwoods.

The object of my invention is to construct a device, as aforesaid, inconvenient and com pact form and so arranged that the desiredcombination of any wood and coat or coats of any desired color may bequickly and conveniently obtained.

A further object of my invention is to enable the above combinations tobe effectively made without requiring any particular judgment ortraining on the part of the user.

Other objects will appear as the specification proceeds.

I accomplish the object of my invention substantially by painting upontwo or more similar glass plates parallel stripes of any desired varietyand number of colors, said stripes being of uniform width and arrangedpreferably in the same sequence on each plate. These plates I thenarrange to slide over one another as well as over a composite platecomprising any desired number and variety of woods arranged in stripsside by side and preferably of the same width; said woods should ofcourse be smoothed but should not be stained or colored, the objectbeing that they should retain their natural appearance.

In making the above arrangement I place the length of the wood strips atright angles to the length of the color stripes. In this way I may slideone glass plate free of the others and, considering any one colorstripe, run down said stripe with the eye and observe the effect of theparticular color upon any oneof the different-woods over which the colorstripe passes. To observe the effect of two coats of any color I slideone color plate over the other until the given color is super posed uponthe same color of the other plate, the underlying woods then beingobservable through two thicknesses, the result representing the effectof two coats of the chosen Specification of Letters Patent.

Application filed June 8, 1909.

Patented Sept. 28, race. Serial No. 500,815.

color. In the same way by using additional plates I may obtain theeffect of any desired number of color coats as applied to the woods.

In the drawings annexed, which form partof this specification, Figure 1represents a plan of a preferred form of my improved indicator; Fig. 2represents a vertical section along the line 22 of Fig. 1; Fig. 3 a similar section along the line 33 of Fig. 1; and Fig. 4 is a plan, on areduced scale of a modified mode of forming the color stripes.

Referring to the drawing, A is a shallow box, the bottom B of which isconstituted of a number of strips a, Z), c, d, etc., preferably of thesame width and of such different woods as it is desired to study withreference to the various colors. Thus woods may be, for example, whitewood, North Carolina pine, oak, ash, maple and cherry, or any otherdesired woods may be chosen. As drawn, I have shown six different woods,but by making the box wider or the strips narrower I may, of course,extend the number of woods indefinitely.

C and D are the glass plates arranged to slide in opposite grooves C, D,each plate having painted thereon parallel stripes of color 1, 2, 3, 4,etc. These colors may, of course, be of any chosen shade, and as manydifferent colors may be used as may be desired. Such colors maybe forexample, red, green, imitation rose wood, imitation inahogany, imitationcherry, etc. I prefer to have these colors arranged in the same quenceon each plate and where there are only two plates, the series of colorsrun in opposite directions for said plates, although this is notimperative. Each glass plate is provided with a binding or border stripE at each end, partly to finish the raw edge of the glass and partly totake hold of in sliding the plates, and each of the binding strips mayhave a depression F in which to catch the fingers and aid in sliding theplates. Best results are to be obtained with my indicator when theplates and the wood strip box bottom are all placed close together.

My invention will be found a convenient device even where it is desiredto note the effect of one color upon different woods, and for suchembodiment I may omit all but one of the striped glass plates.

I have described my device as applicable to tests of stains; instead ofstains, paints til) may be employed but in such case the coats must bevery thin as otherwise so much light will be absorbed in passing throughsaid coats that the grain and structure of the wood will be completelyhidden.

It is, of course, obvious that besides being useful for the purpose ofobserving the effect of successive coats of the same color upon the woodmy invention may also be employed to observe the effect of combinationsornixtures of different colors. And by using pure spectral colorsvarying in a standard and known manner, and suitably indicated, anydesired tint could be produced upon the wood according to a formula, orquantitatively analyzed into the constituent-s necessary to reproduce itthereon.

In describing my invention I have speci-. fied glass as the vehicle ormedium upon which the color stripes should be placed but I wish itunderstood that other substances may be used for such vehicle withoutdepartingfrom the spirit of the invention; transparent celluloid orclearmica would be equally suitable and, in some respects, better as beingless brittle and, hence, less liable to damage. Indeed, any material maybe used as, such vehicle, provided only it may be formed in thin plates,is substantially transparent, and is durable.

Throughout the specification I have spoken of wood as constituting theback ground upon which the color effect is to be observed and wood is,indeed, the chief material upon which it is usual to place such colorsas are pertinent to my invention. But any substitute for wood in most ofthe many purposes for which wood is employed may be used for saidback-ground without departing from the spirit of my invention; thus ironas used in the trim of fire-proof buildings and in fire-proof railwaycoaches, papier mach, and many manufactured products are among suchsubstitutes.

In the embodiment of my invention just described I have referred to thewood strips as being smoothed but unstained, 2'. 0. having their naturalfinish. There may arise, however, special circumstances where it may bedesired to observe the effect of one or more coats of color upon woodalready treated with one or more coats of the same or another color. Theuse of Woods thus colored lies within the spirit of my invention. Also.I may substitute for the parallel stripes of color on a given pane ofglass, parallel strips of glass of difierent colors suitably placed inone frame, without departing from the spirit of my invention; this isshown in Fig. l.

Othermodifications of detail may be made within the domain of myinvention, which having now described, I have embodied in the followingclaims:

1. A stain indicator comprising a plurality of parallel laterallyadjacent strip backgrounds and an independent plurality of parallellaterally neighboring color stripes the direction of the color stripesbeing at right angles to that of the background strips and each of saidcolor stripes being adapted to. be superposed at one end and the sametime upon all the background strips, substantially and for the purposedescribed.

2. A stain indicator comprising in combination, a plurality of laterallyadjacent strip backgrtmnds and a plurality of sets of color stripesadapted to be independently placed thereover the color stripes being at.right angles to the background strips, substantially as and for thepurpose described.

3. A stain indicator comprising in combination, a plurality of laterallyadjacent lengthwise strip backgrounds and a pair of glass plates eachcarrying a plurality of crosswise color stripes and independentlyslidable over the background strips, substantially as and for thepurpose described.

f, A stain indicator comprising in combination a box provided with abottom whose inner face shows a plurality of lengthwise strips ofdiffering materials and with sides containing grooves; and a pair of"glass plates adapted to slide in said grooves each of said platescarrying a plurality of crosswise color stripes, substantially as andfor the purpose described.

In. testimony whereof I have hereunto set my hand in the presence of twosubscribingwitnesses.

EDMUND ECKART. \Vitnesses JOHN; M. LYNCH, J HN; Hanan.

